Mercurial > hg > octave-kai > gnulib-hg
view tests/test-roundl.c @ 9375:96fea5b2eb11
Implement 'round', 'roundf', 'roundl' modules.
author | Ben Pfaff <blp@cs.stanford.edu> |
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date | Sat, 20 Oct 2007 13:08:26 -0700 |
parents | |
children | 0be6f1ab456d |
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/* Test of rounding to nearest, breaking ties away from zero. Copyright (C) 2007 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* Written by Ben Pfaff <blp@gnu.org>, 2007. Based heavily on Bruno Haible's test-truncl.c. */ #include <config.h> #include <math.h> #include <stdio.h> #include <stdlib.h> #include "fpucw.h" #include "isnanl-nolibm.h" #define ASSERT(expr) \ do \ { \ if (!(expr)) \ { \ fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \ abort (); \ } \ } \ while (0) int main () { DECL_LONG_DOUBLE_ROUNDING BEGIN_LONG_DOUBLE_ROUNDING (); /* Zero. */ ASSERT (roundl (0.0L) == 0.0L); ASSERT (roundl (-0.0L) == 0.0L); /* Positive numbers. */ ASSERT (roundl (0.3L) == 0.0L); ASSERT (roundl (0.5L) == 1.0L); ASSERT (roundl (0.7L) == 1.0L); ASSERT (roundl (1.0L) == 1.0L); ASSERT (roundl (1.5L) == 2.0L); ASSERT (roundl (2.5L) == 3.0L); ASSERT (roundl (1.999L) == 2.0L); ASSERT (roundl (2.0L) == 2.0L); ASSERT (roundl (65535.999L) == 65536.0L); ASSERT (roundl (65536.0L) == 65536.0L); ASSERT (roundl (65536.001L) == 65536.0L); ASSERT (roundl (2.341e31L) == 2.341e31L); /* Negative numbers. */ ASSERT (roundl (-0.3L) == 0.0L); ASSERT (roundl (-0.5L) == -1.0L); ASSERT (roundl (-0.7L) == -1.0L); ASSERT (roundl (-1.0L) == -1.0L); ASSERT (roundl (-1.5L) == -2.0L); ASSERT (roundl (-2.5L) == -3.0L); ASSERT (roundl (-1.999L) == -2.0L); ASSERT (roundl (-2.0L) == -2.0L); ASSERT (roundl (-65535.999L) == -65536.0L); ASSERT (roundl (-65536.0L) == -65536.0L); ASSERT (roundl (-65536.001L) == -65536.0L); ASSERT (roundl (-2.341e31L) == -2.341e31L); /* Infinite numbers. */ ASSERT (roundl (1.0 / 0.0L) == 1.0 / 0.0L); ASSERT (roundl (-1.0 / 0.0L) == -1.0 / 0.0L); /* NaNs. */ ASSERT (isnanl (roundl (0.0L / 0.0L))); return 0; }